喷射聚丙烯纤维混凝土力学性能正交试验研究

发布时间：2018-04-22 13:48

本文选题：聚丙烯纤维 + 喷射混凝土　；参考：《混凝土》2017年09期

【摘要】：使用聚丙烯纤维掺入混凝土中以提高材料的各项性能得到广泛的关注,采用绝对体积法设计了喷射混凝土的配合比,完成了9组不同配合比7、28 d抗压,抗拉强度及28 d抗折强度的试验,利用正交试验的方法,考察了纤维长度,水泥用量,砂率和水灰比对混凝土抗压,抗拉及抗折强度的影响。通过系统的分析,得出了各因素对3种强度的影响顺序,结果表明,水灰比对材料的3种强度均具有特别显著的影响,纤维长度对抗拉强度影响显著,砂率对抗压和抗折强度影响显著,而水泥用量则影响较小,最终得到了最佳配合比方案,为喷射聚丙烯纤维混凝土的推广与应用提供依据。
[Abstract]:The use of polypropylene fiber in concrete to improve the properties of the material has received extensive attention. The mix ratio of shotcrete is designed by using absolute volume method. Nine groups of different blending ratios of 7 to 28 days of compressive resistance have been completed. The effects of fiber length, cement content, sand ratio and water-cement ratio on the compressive, tensile and flexural strength of concrete were investigated by orthogonal test. Through systematic analysis, the influence sequence of each factor on the three kinds of strength is obtained. The results show that the water-cement ratio has a remarkable effect on the three kinds of strength of the material, and the fiber length has a significant effect on the tensile strength. The effect of sand ratio on compressive strength and flexural strength is significant, but the cement content has little effect on it. Finally, the optimum mix ratio scheme is obtained, which provides the basis for the popularization and application of sprayed polypropylene fiber reinforced concrete.
【作者单位】：安徽理工大学土木建筑学院;
【基金】：安徽省高校自然科学重大项目资助(KJ2015ZD20) 国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(anhui-0003-2016AQ)
【分类号】：TU528.572

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